A pregnant woman’s water apparently broke after she had been dancing at a nightclub early Saturday, sparking an argument that ended with a shootout, Kansas City police said. A 40-year-old man was critically injured in the 12:40 a.m. shooting outside E.B. Bar & Grill, 3015 Main St. A man not involved in the dispute was struck by a bullet in the buttocks as he sat in his vehicle, police said.

Investigators said the pregnant woman’s situation prompted some people to make unkind comments about why she was at the club, which sparked an argument between two groups of men. The dispute spilled outside, where gunfire was exchanged between a group outside the club and a group in a sport utility vehicle. Police found the critically wounded man in middle of the street. Friends of the man had been yelling, “Shoot! Shoot! Shoot!” witnesses told police.

Officers patrolling nearby stopped the fleeing SUV. Gang-squad investigators later recovered a gun near 27th and Main streets. They think someone tossed the gun from the fleeing vehicle.

On Monday, the U.S. attorney filed a felon-in-possession charge against Cyrano R. Irons, 23, saying he fired a .40-caliber gun from the SUV. He was on probation in Missouri for aggravated assault, according to court records.